Spectrophotometric Determination of Trace of Mercury in Traditional Chinese Medicine with Iodine-Rhodamine B-Polyvinyl Alcohol
- VernacularTitle:碘化物-罗丹明B-聚乙烯醇光度法测定中成药中微量汞的研究
- Author:
Guangxin CHENG
;
Lihua WANG
;
Kunyi NI
- Publication Type:Journal Article
- From:
Chinese Traditional and Herbal Drugs
1994;0(12):-
- CountryChina
- Language:Chinese
-
Abstract:
A spectrophotometric method for the determination of trace amounts of mercury (Ⅱ ) was described based on the formation of a complicated ion-association complex of Hg (Ⅱ )-Ⅰ-Rhodamine B in ihe presence of polyvinyl alcohol. The maximum absorption of the ion-association complex was at 595nm, Beer's law was obeyed for mercury (Ⅱ ) in the range of 0~5?g/25ml. The apparent molar absorptivity was 7. 36 ?105L/mol?cm. The recovery of mercury was 97. 0% ~ 103. 0%,RSD
